Abstract: A radio frequency receiver for receiving an interleaved single carrier chirp spread spectrum signal based on a chirp sequence includes: a demodulator configured to receive, demodulate, and digitize a modulated radio frequency (RF) signal to form a digital baseband signal; and a signal decoder configured to: despread the digital baseband signal by at least: buffering signal data into blocks of L samples; multiplying the blocks of data with a conjugate of the chirp sequence to form a result; and performing a Fast Fourier Transform (FFT) on the result; equalize data from the FFT to form N data values, where N is the number of subchannels; transform the N data values into N demodulation symbols via an N-point inverse Fourier transform; and decode the demodulation symbols to form codec symbols.

Abstract: A vehicular vision system includes a plurality of cameras disposed at the vehicle and having respective fields of view exterior of the vehicle and being operable to capture frames of image data. Image data captured by each of the first camera is provided to an ECU via a respective ETHERNET link from the respective camera to the ECU. Control signals controlling operation of each camera are provided from the ECU to the respective camera via the respective ETHERNET link. Each camera receives from the ECU via the respective ETHERNET link a camera control signal that regulates timing of the respective camera to be synchronous with reference timing of the ECU. Regulation of timing of each camera includes starting the respective camera synchronous to the ECU reference timing and holding the respective camera synchronous to the ECU reference timing.

Abstract: Approaches are described for generating a multiview autostereoscopic image from a stereo three-dimensional input image pair. A stereo to multiview rendering system receives a stereo three-dimensional image including a left image and a right image at a first view position and a second view position, respectively. The system generates a first input warp and a second input warp that maps the left image and the right image to a third and fourth positions, respectively, where the third and fourth positions lie between the first and second view positions. The system generates a plurality of output warps based on the first warp and the second warp. The system resamples each output warp in the plurality of output warps to create a plurality of partial output images. The system interleaves the plurality of partial output images to generate a composite output image.

Abstract: A vehicle door control system includes a camera disposed at a portion of the vehicle and having a field of view that encompasses a region exterior of the vehicle that is swept by a door of the vehicle as the door is opened and closed via a powered door opening/closing system of the vehicle. An image processor is operable to process image data captured by the camera to detect an object present in the region that is swept by the door when the door is opening and to determine if the door may collide with the detected object when the door is being opened. During opening of the door and responsive to determination of a potential collision of the opening door with the detected object, the vehicle door control system positions the door at a partially open position whereby a gap is established between the door and the detected object.

Abstract: A method and apparatus for acquiring time and frequency synchronization in a DSSS receiver are disclosed. An iterative approach is used in acquiring a DSSS signal when the phase coherency of the signal is less than the symbol length.

Abstract: A vehicular vision system includes an image sensor and an image processor. The image sensor is disposed at a vehicle and has an exterior field of view. The image sensor is operable to capture image data. The image processor is operable to process captured image data. The vision system is operable to automatically synchronize the image sensor to an ECU reference timing. The vision system may power on the image sensor synchronous to the ECU reference timing, and the vision system may regulate the timing of the image sensor synchronous to the ECU reference timing. The vision system may regulate the timing of the image sensor between a fast mode and a slow mode to synchronize the timing of the image sensor to the ECU reference timing.

Abstract: A hatch control system for a vehicle includes a camera disposed at a rear portion of the vehicle and having a rearward field of view that encompasses a region at the rear of the vehicle that is swept by a hatch or liftgate or deck lid or door of the vehicle as the hatch is opened and closed, such as via a powered hatch opening/closing system. An image processor is operable to process image data captured by the camera to determine if an object is present in the region that is swept by the hatch to determine if the hatch may collide with the detected object when the hatch is being opened/closed. Responsive to determination of a potential collision of the hatch with a detected object, the vehicle hatch control system may stop movement of the hatch and/or may move the hatch to a holding position.

Abstract: A radio frequency receiver for receiving an interleaved single carrier chirp spread spectrum signal based on a chirp sequence includes: a demodulator configured to receive, demodulate, and digitize a modulated radio frequency (RF) signal to form a digital baseband signal; and a signal decoder configured to: despread the digital baseband signal by at least: buffering signal data into blocks of L samples; multiplying the blocks of data with a conjugate of the chirp sequence to form a result; and performing a Fast Fourier Transform (FFT) on the result; equalize data from the FFT to form N data values, where N is the number of subchannels; transform the N data values into N demodulation symbols via an N-point inverse Fourier transform; and decode the demodulation symbols to form codec symbols.

Abstract: A radio frequency receiver for receiving an interleaved single carrier chirp spread spectrum signal based on a chirp sequence includes: a demodulator configured to receive, demodulate, and digitize a modulated radio frequency (RF) signal to form a digital baseband signal; and a signal decoder configured to: despread the digital baseband signal by at least: buffering signal data into blocks of L samples; multiplying the blocks of data with a conjugate of the chirp sequence to form a result; and performing a Fast Fourier Transform (FFT) on the result; equalize data from the FFT to form N data values, where N is the number of subchannels; transform the N data values into N demodulation symbols via an N-point inverse Fourier transform; and decode the demodulation symbols to form codec symbols.

Abstract: In one embodiment a method for suppressing narrowband interference in an RF signal is provided. The method includes providing a block of baseband digital samples of the RF signal and computing n-1 stages of an n stage fast Fourier transform (FFT) on the block of the baseband digital samples to produce a first block of intermediate data points. A final threshold is computed based on values of the intermediate data points. A final stage of the n stage FFT is computed from the first block of intermediate data points to produce a block of output data points, and the output data points that have an energy above the final threshold are attenuated.

Abstract: A system comprises a target node having an unknown location and at least three reference nodes within communication range of the target node. Each of the reference nodes has a known location. At least one of the reference nodes is configured to initiate a two-way time of flight transaction with one or more of the other reference nodes by transmitting a respective request to the one or more other reference nodes. Each of the reference nodes is configured to transmit a reply in response to a received request. The target node is configured to observe the request and reply of each two-way time of flight transaction and to determine a respective time differential between when the target node received each respective request and its corresponding reply of each observed two-way time of flight transaction.

Abstract: Techniques are disclosed for rendering images. The techniques include receiving an input image associated with a source space, the input image comprising a plurality of source pixels, and applying an adaptive transformation to a source pixel, where the adaptive transformation maps the source pixel to a target space associated with an output image comprising a plurality of target pixels. The techniques further include determining a target pixel affected by the source pixel based on the adaptive transformation. The techniques further include writing the transformed source pixel into a location in the output image associated with the target pixel.

Abstract: In one embodiment a method for suppressing narrowband interference in an RF signal is provided. The method includes providing a block of baseband digital samples of the RF signal and computing n-1 stages of an n stage fast Fourier transform (FFT) on the block of the baseband digital samples to produce a first block of intermediate data points. A final threshold is computed based on values of the intermediate data points. A final stage of the n stage FFT is computed from the first block of intermediate data points to produce a block of output data points, and the output data points that have an energy above the final threshold are attenuated.

Abstract: A hatch control system for a vehicle includes a camera disposed at a rear portion of the vehicle and having a rearward field of view that encompasses a region at the rear of the vehicle that is swept by a hatch or liftgate or deck lid or door of the vehicle as the hatch is opened and closed, such as via a powered hatch opening/closing system. An image processor is operable to process image data captured by the camera to determine if an object is present in the region that is swept by the hatch to determine if the hatch may collide with the detected object when the hatch is being opened/closed. Responsive to determination of a potential collision of the hatch with a detected object, the vehicle hatch control system may stop movement of the hatch and/or may move the hatch to a holding position.

Abstract: A radio frequency receiver for receiving an interleaved single carrier chirp spread spectrum signal based on a chirp sequence includes: a demodulator configured to receive, demodulate, and digitize a modulated radio frequency (RF) signal to form a digital baseband signal; and a signal decoder configured to: despread the digital baseband signal by at least: buffering signal data into blocks of L samples; multiplying the blocks of data with a conjugate of the chirp sequence to form a result; and performing a Fast Fourier Transform (FFT) on the result; equalize data from the FFT to form N data values, where N is the number of subchannels; transform the N data values into N demodulation symbols via an N-point inverse Fourier transform; and decode the demodulation symbols to form codec symbols.

Abstract: A radio frequency communication system. The system includes a radio frequency transmitter and a radio frequency receiver, wherein the radio frequency transmitter includes a modulation circuit and an RF modulator, wherein the radio frequency transmitter maps each block of K information bits into a block of N transmit symbols, transforms the block of N transmit symbols by using symbol block repetition and spreads the symbol blocks by multiplying the symbol blocks by a predefined chirp signal, and wherein the radio frequency receiver includes a chirp receiver operable to receive, demodulate and digitize a modulated radio frequency (RF) signal to form a digital baseband signal, and to recover a signal modulated using interleaved single carrier chirp spread spectrum modulation.

Abstract: A hatch control system for a vehicle includes a camera disposed at a rear portion of the vehicle and having a rearward field of view that encompasses a region at the rear of the vehicle that is swept by a hatch or liftgate or deck lid or door of the vehicle as the hatch is opened and closed, such as via a powered hatch opening/closing system. An image processor is operable to process image data captured by the camera to determine if an object is present in the region that is swept by the hatch to determine if the hatch may collide with the detected object when the hatch is being opened/closed. Responsive to determination of a potential collision of the hatch with a detected object, the vehicle hatch control system may stop movement of the hatch and/or may move the hatch to a holding position.

Abstract: Approaches are described for generating a multiview autostereoscopic image from a stereo three-dimensional input image pair. A stereo to multiview rendering system receives a stereo three-dimensional image including a left image and a right image at a first view position and a second view position, respectively. The system generates a first input warp and a second input warp that maps the left image and the right image to a third and fourth positions, respectively, where the third and fourth positions lie between the first and second view positions. The system generates a plurality of output warps based on the first warp and the second warp. The system resamples each output warp in the plurality of output warps to create a plurality of partial output images. The system interleaves the plurality of partial output images to generate a composite output image.

Abstract: A radio frequency communication system. The system includes a radio frequency transmitter and a radio frequency receiver, wherein the radio frequency transmitter includes a modulation circuit and an RF modulator, wherein the radio frequency transmitter maps each block of K information bits into a block of N transmit symbols, transforms the block of N transmit symbols by using symbol block repetition and spreads the symbol blocks by multiplying the symbol blocks by a predefined chirp signal, and wherein the radio frequency receiver includes a chirp receiver operable to receive, demodulate and digitize a modulated radio frequency (RF) signal to form a digital baseband signal, and to recover a signal modulated using interleaved single carrier chirp spread spectrum modulation.

Abstract: A radio frequency locator system and method. First, second and third reference devices are operable to transmit a plurality of spread spectrum chirp signals frequency offset from one another. An object device is operable to receive the plurality of spread spectrum chirp signals, the object device is further operable to evaluate the received plurality of spread spectrum chirp signals for relative phase shifts between the plurality of spread spectrum chirp signals and derive a fine propagation time between the reference devices and the object device using the phase shifts between the spread spectrum chirp signals. The reference devices determine their location independent of the object device and determine the location of the object device as a function of each of their locations and of their range to the object device.